Lamp-socket.



MILTON W. MRSE, OF MOUNT VERNON, NEW' YORK.

Ainrrr'iasocnnu.

ascisse.

Specification of Letterslletent.

Patentedpr. 22, Ewig.

Application nled August 3, H6. Serial No. 112,883.

" To all whom t may concern.'

I yfilamentsa bright 'struct-ing lamps of this character Be it linown that l, MILTON W. MORSE, a citizen ot' the United States of America, and resident of Mount Vernon, in the county O Westchester and State of New York, have invented certain new and useful Improven ments in Lamp-Sockets, of which the following is a specication. y

This invention is a lamp socket, and more particularly a lamp socket for use with lamps embodying two filaments, which laments are generally of different size so that when a current is passed, through one of the light results, but when the current is passed through the other lilament a relatively dimf light is produced. Lamps of this general character' have long been in use, the larger or brighter lament being used -tor reading, etc., while the smaller lament vis adapted for use las a nightlight in sleeping rooms, halls andthe i like where a strong light is not desired.

lt hasgenerally been the practice in conto vary the intensity of light Vin filaments of di'erent sizes by the employment of varying `resistances and, vwhile such lamps producefthe de- 'sired degree or" light, they manifestly require substantially the same amount of current to operate the smaller filament as when the larger lament is employed. rlhus, though much less light is produced when the smaller lament is in incandescent state, substantiallythe same amount of power is required to furnish this'smaller amount of light. ln lamps of this character there is, therefore, no saving' in the smaller light over the greater light. With the foregoing in mind, the present invention has for its object the provision ci an' improved lamp socket wherein no resist ant means is required and wherein the electric current is fed directly from the supply wire to either of the larger or smaller laments, whereby much less power is required to raise the smaller lament to incandescence then is required to similarly condition the larger filament. l

L further object of the inventionis to provide an improved construction which is mierable by a pull chain connection for f placing either of vthe lilaments ci the lamp in electrical communication with the source ofpower and subseq ent-ly disconnecting either of said filaments.; y y

Features ci the invention, their attainshown thereini is to lamp socket ments and advantages, other than those specified, will be apparent from the `following description, read in conjunction with the accompanying drawings. A

ln the accompanying drawings, "I have illustrated one practical embodiment of the present invention, but the construction of the invention.

Figure -l is a vertical section through a embodying the present invention, said section being taken substantially in the plane of line l-l of Fig. 2.

Fig. 2 is a similar section taken in the plane of line 2-2 ci' F ig. 4.

Fig. 3 is a like section taken in the plane of line 3 3 of Fig. 2.

Fig. 4: is a horizontal section taken plane of line of 'F ig. 3.

Fig. 5 is a like section taken of line 5-5 or" F ig. 2. l l

Fig. 6 is a detail elevation ci a segmental operating member which l, prefer to employ.

Figs. 7 and 8 are an elevation and edge view, respectively,- of a clutch member adapted to coperate with the segmental member or" Fig. 6. Figs. 9 and lO'are an elevation and top plan view of the form ot' lamp adapted to coperate with the lamp socket of this invention. l

Referring to the drawings, A indicates an outer shell or casing, preferably formed from sheet .metal as usual,` provided interiorly of its lower portion with the usual helically corrugated shell B into which the plug C of a lamp il is adapted to be screwed. The upper edge of theinner shell B abuts the lower face of a partition D of insulating material, preferably porcelain liber or the like, which partition is secured within the outer shell A in any suitable manner.-

The top of the shell A is closed by an upper partition E of insulating material, and a covering shell F is adapted to overlie the partition E and close the top of the outer shell, being secured to said shell in any suitable manner. interposed between in the plane partitions D and E `are a pair of oppositely positioned complein the p be understood as illustrative, only, and not as defining the limits ing euch rotation, the

troni engageto he insu- 4ca-hle which is passed through an opening it in. the over l", the positive and negative Wires; ot' which cable are secured to two hinding post z' 'i'. Binding post 'i is in the form oit: a. holt which passes through the upper partition E and extends downwardly through the lower partition D into electrical communication with the inner shell B ot' the socket. Thehinding post a" is in 'the form of a screw, secured in the upper partition and having electrical connection through a wire or plate with one of the arcuate plates as clearly shown in 2.

Journaled at ita opposite ends in the platee g and extending in horizontal position, is a Shaft or spindle J' on which loosely mounted a coniinutatcr disk K, preferably oli' corr ductive material, and provided on its pe riphery with a plurality of .Spring` contacts le. ifloinnuiitator l is adapted to he rotated by lucana hereinafter described, and, durepring contacts if:

are adapted to he periodically brought into, and suheetuiently moved. out. of engagement with liied Contact platee il L". These plates are cui-rial on a radius` concentric with the shait't J and are iilsulated troni one another hy the insulating character ol? the partition l), ou opstanding portions of which they are supported. The Contact plate L is connected in any suitable way, suoli as hy a wire m, with a Contact l positioned on. the under Side of the partition and centrally thereof, While 'the Contact plate il" is electrically connected by wire m', or other suitable i 3ans, to a brush l also lifted on the nude:` i ol: partition D `hut oli' center. The relation between. the Contact Z and hrueh is clearly shown in vFi 5 and 'these parte are so 'p I)ned that when a lmnp is screwed into 'the socket, contact Z is adapted to engage with a piu. or other hle contact. itl positioned at the couter 1 i Y, f i! if, .1"111/ ,Qi Zf u v tnt plug?`v ol the amp, u ii i, )rial f le adapted to he engaged hy a collector ring lli/if concentric with the pin M and also liXed to the lamp plagas shown heet in Figs. 9 and 10.

As liereinhe'lxue 9, thelamp C la niente c and c', Smaller than 'the latter. ueetcd at one cuil to the of the lamp. as ie usual. its other end in the pin lil'. in like inauuer the larger filament c is ronnected lo the shell ot the pino uml terminatea at other end in an electrical connection with the Collector ring; lil. '.llhue, when the lamp is screwed into the socket, the smaller filament c will be placed, through contact Z, in comhetated, and Shown in Fig. provided with two iilathe former ot which is `lfilanunt o is coneliell of the plug and terminates at.

noemen munication with the Contact plate L, 'Whereas the larger tilainent c will he electrically connected, through brush l', with the Contact lt will thus appear that, if the con'imuta.- tor is rotated to bring one of the spring contacts k int'o engagement with the cont-act plate L', a circuit will he completed through a large lanent of the lamp, hut, it' one of said Spring; contacts is brought into engage nient With contact L, the 'smaller lila-ment will he placed in the circuit. Furthermore, if spring contacts are not engaged with either oit the plates L L then neither filament will be energized and the lamp will he dead Suitable means is provided for imparting rotation to the ooinmutator K to control the current dispensation, but, in the prefer-red form shown in the drawings, this means is ot auch character that it may he readily operated by means of a pull chain il which passes through an outlet n in the outside shell and into convenient and accessible position. The end of the chainN is secured on the remote side of a segment 0, as at fa; Segment O is mounted for oscillation on sha-ft J but is normally held in a direction to draw a portion of the chain into the eX- ternal shell by means of a spring o coiled around shaft J with one end affixed to the adjacent pla-te and the other end secured to the SeginentO. The tension ot' spring 0 normally serves to maintain segn'ient G in retracted position, as shown in Fig. 3. rl`he Segment O is, moreover, electrically insulated from the shaft J so that an operator, in pulling the chain. or cord N, will not receive shocls.

The 'face oit the segment. 0, adjacent the con'irnutator disk, K, is provided with a plurality of laterally extending Shoulders or ratchet teeth j, as shown in Fig. 6, and upon the adjacent face of eominntator disk K is secured a similarly formed plate l?, shown in 7 and 8, provided with similar shoulders or ratchet teeth p. For convenience inunanufacture, the plate l) is made separate and subsequently secured to the segment O although, it desired, the ratchet teeth p may he formed direct-ly upon the segment, this structural difference being irnmaterial. lt will he manifest that in either case, the ratchet teeth p are opposed to the ratchet teeth j and both ratchet teeth are swung on substantially the same radii.

lhen the parts are assembled in the manner described., the Spring o, 1oesides iinpellingr the segment into a retracted posi tion, simultaueo-usly forcee the segment 0 toward the adjacent face ol the comunitator with the result that the ratchet teeth y) and are maintained in cooperative re lation. Alle the eommutator dish K and segment O are mounted on the shaft J for lill relative rotation, it will be manifest that the rotation of the segment in a direction opposed to the ratchet teeth of the co1nmutator will cause the commutator to be moved with the segment, and the arrangen'ient is such that this result is accomplished by the pulling of the chain or cord` N. Assuming, therefore, that chain N is pulled, it will be obvious that the oscillation of the segment in such direction will impart rotary movement to the conunutator and that, as soon as the chain is released, the spring o will return the segment to its retracted position, during which return movement the coperyating ratchet teeth will ride idly over one Vanother so that the connnutator is left in the position into which it was moved by the pulling of the chain.

By operating the commutator in the manner described, .e., by successive operations .ot the chain, the spring contacts It may be brought into position to energize the larger .filament c', the smaller filament c, or it Avretracted positions. that if a comnlutator is moved from the po-4 may be moved in such the lamp 4h"dead Spring contacts /lr are preferably so organized that, when in engagement with either ot` the contact plates', they are under tension and, as noticeable iii-Fig. l, said spring contacts in leaving either oit' the contact plates are frceito quickly assume their lt will thus be clear position as to render sition shown in Fig. l, in a cloakwise direction, the spring contact/, which is closing the circuit through the larger filament c, will be moved to the dotted line position between contact plates L L, in which position neither plate will be engaged and the circuit will be broken. However, in assuming the dotted line position, the movement of the.

spring willl be of a sudden nature so that when it slips oit the end of the plate L and engages with the upper face of the partition D, a sharp clicking noise may be heard. This clicking noise will be repeated when, by a successive operation of the commutator, said spring contact leaves the plate L and engages with the upstanding portion cl of the bracket on which plate L is mounted.

Thus, when an operator pulls the pull cord or chain N, the movement of the spring contacts out of engagement with the circuit closing devices to break the circuit, gives any audible signal to the operator that the operation which he was carrying out by pulling the cord is completed and apprises him ot the fact that further operation of the chain is unnecessary to complete one step in the cycle of operations.

By the structural arrangements hereinbefore described, the commutator may be rotated to a position shown in Fig. l, wherein the circuit through the larger iilamcnt is completed by subsequent operation the comtion denergized. ln thestructure shown,

the cycle oi' ope ations ,consists in, first energizing thevlarger filament,thien rendering the lamp 'dead,`then energizing the smaller filament and, lastly, rendering` the lamp dead. These operations are carried out by successive operations of the pull cord or chain N, at the will of the operator.

The foregoing arrangement of the parts is very simple and the resulting structure is highly letl'e'ctive and eiiicient in its opera* tion, the minimum number of parts and each part operates uponv basic mechanical principles. It yis impossible to insert a lamp in such manner that, its laments will not -be operatively associated with the electrical connections of the socket, and the insulation throughout is so thoroughly carried that danger ot' electric shocks is absolutely preeluded.

lt will be understood that slight changes and modifications may be made in the speciiic structure described without departing from the spirit of the invention, the scope of which is conmiensurate with the appended claims. f

Having thus fully described the invention, what I claim as new, and desire to secu-re by Letters Patent, is:

l. As a new article of manufacture, a two .tilament lamp socket embodying a housing shell, partitions ot' insulating material positioned across the upper and lower portions otl the shell, arcuate members positioned in complementary relation between said partitions and oneoii which members is 'electrically connected with a source of electrical energy, a shaft mounted at its opposite ends in said members, a commutator device mounted for rotation on said shaft and electrically connected with the current-carrying member, means for intermittently rotating said device, and contacts mounted on the upper face of the lower partition and adapted to cooperate with the commutator device, in combination with means, positioned beneath the lower partition, and supported thereby, for securing a multi-filament lamp in place, cont-acts on the under side of said lower partition, to be engaged'by the corresponding contacts of the lamp associated with the socket, electrical connections between certain of the contacts on the under side of the lowerv partition and the corresponding contacts on the upper side thereof, `and electrical con nections between the remainder of the lamp engaging contacts and the sonrce of electrical energ Q. As a new article of manufacture, a two lament lamp socket embodying a housing v.mounted on the shaft and adapted for rotary movement relative to the commntator, means for normally maintaining the segment in retnacted position, a flexible tension inember coperating .with said segment and ere tending to a position exterior of the lionsing shell for rotating the segment away from its retracted position, ratchet connections between the segment and the commui tator for imparting movement to the commntator when tension is applied to the tension member, and contacts mounted on the upper face of the lower partition and adapted to cooperate with the commutator device, in combination with means, positioned beneath the lower partition, and supported thereby, for securing a multi-filament lamp in place, contacts on the 'under side of said lower partition, to be engaged by the corresponding contacts ot the lamp associated with the socket, electrical coni'iections between certain or' the contacts on the under side-oi the lower partition and the correspending contacts on the upper side thereof, and electrical. connections between the remainder of the lamp engaging contacts and the source of electrical energy.

A3. As a new article of manufacture, a two incinte position, ratchet connections between the segi'nent and thev connnutator for imparting movement to the commntator when tension is applied to` the tension member, and contacts mounted on the upper face of the lower partition and adapted to cooperate witlrthe conimntator device, in combination with means, positioned beneath the lower partition, and supported thereby, for securing a niulti-tilament lamp in place, contacts on the under side of said lower partition, to be engaged by the corresponding contacts of the lamp associated with the socket, electrical connections between certain of the contacts on the under side of the lower partition and the corresponding contacts on the upper side thereof, and electrical connections between the remainder of the lamp engaging contacts and the source or' electrical energy.l

ilened by me at Mount Vernon, N. Y., this `20th day of July, 1916.

MLTON W MORSE. llfitnesses C. E. "WHITNEY, E. R, lllfnrrimr. 

